The best way to understand why HIS book should be read is this=EPHESIANS 4=12TO16.To prepare GOD'S people for works of service, so that the body of CHRIST; may be built up until we all reach unity to the faith and to the knowledge of the son of GOD and become mature attaining to the whole measure of the fullness of CHRIST. Then we will no longer be infants; tossed back and fourth by the waves, and blown hear and there by every wind of teaching and by cunning and craftiness of men in their deceitful scheming . Instead speaking the truth in love we will in all things, grow up into HIM who is the head that is CHRIST. From HIM the whole body, joined and held together by every supporting ligament, grows and builds it self up in love as each part does it's own work.. This the whole purpose of HIS book.